Vidalista 40 mg actions are all directly or indirectly under the control of its chief substance salt Tadalafil Citrate. When you choose to take the pills it is due to the actions of the Tadalafil only that you get a hard penis erection. It starts by allowing the presence of PDE-5 hormones to drop and get eliminated. cGMP hormone begins secretion and its concentration levels rise soon. Now blood vessels soon start to dilate and this occurs due to nitric oxide that is talking in control. Read more: Medsever